Use the Parallel Glider Drafting Tool to:

Draw horizontal parallel lines: Hold glider firmly in place and draw a
line across ruled edge. Move to next position and repeat.

Draw vertical parallel lines: Place the pencil through one of the holes
on the ruled edge and roll glider up or down to produce the line. Place
pencil in another hole and repeat.

Draw circles: Place a pin in a one of the holes on the ruled edge
creating a pivot point and the center of the circle. Select a circle radius,
place pencil in this corresponding hole, and rotate the glider around the
pivot point with pencil to draw the circle or arc.

Draw a angled line: Draw a straight line. Make a small mark where the
angled line will intersect. Align the center of the glider at this point.
The glider is also a protractor. Rotate glider so the original line lines up
on the desired angle to draw. Draw the angled line using the ruled edge.

Measure an angle: Place the ruled edge’s center at the angles vertex.
Align the ruled edge with one line. Use the 2nd line to read the angle off the glider’s
protractor.

Alvin Parallel Glider Tool Features:

Two sizes 10” and 14” each size is available in either inch or metric
graduations

Durable acrylic blade with printed graduations

Holes on ruled edge at ½" increments for drawing circles and vertical
lines.